JLo baby medical scare

Jennifer Lopez has revealed that a medical scare led her to start her charitable foundation. Read on to find out what was wrong with one of her twins.

Megastar and newly-single mom Jennifer Lopez says that the fear that something was dreadfully wrong with her baby daughter led her to start a charitable foundation to help the less fortunate gain access to top-notch healthcare.

Lopez told Alina Cho on the CNN special Big Stars Giving Big that it was a scary situation with daughter Emme, that occurred when the twins were just days old, that sent her into a tailspin -- and made her realize not everyone has the same resources she and then-husband Marc Anthony do.

Lopez told CNN that she found a lump on little Emme's head when the tot was fresh from the oven -- and it scared them even more because Anthony's sister died of brain cancer at age eight.

"I remember looking at Marc and going, 'We should call the doctor,'" Lopez explained. I started panicking a little bit and he was panicking too because… we were thinking, 'Did somebody drop her when we weren't looking?' I just remember looking at him and saying if this baby… if Emme's not going to be OK, I'm not going to be OK. He's like… I'm not going to be OK... none of us are going to be OK."

"Luckily for us, it turned out OK," the American Idol judge said. "I was like 'What if I didn't have that? What if I didn't have access to great health care? What if I was a mom just sitting there and there was something wrong with my baby and there was nothing I could do about it?'"

To help moms in that unenviable position, Lopez started the Maribel Foundation to provide pediatric medical services to those in need -- named after Anthony's little sister.

See the rest of the celebrity interviews when Big Stars Big Giving airs Saturday and Sunday on CNN. Check your local listings for times.